<?php
/**
* Cpdf
*
* http://www.ros.co.nz/pdf
*
* A PHP class to provide the basic functionality to create a pdf document without
* any requirement for additional modules.
*
* Note that they companion class CezPdf can be used to extend this class and dramatically
* simplify the creation of documents.
*
* IMPORTANT NOTE
* there is no warranty, implied or otherwise with this software.
*
* LICENCE
* This code has been placed in the Public Domain for all to enjoy.
*
* @author		Wayne Munro <pdf@ros.co.nz>
* @version 	009
* @package	Cpdf
*/
class Cpdf {

/**
* the current number of pdf objects in the document
*/
var $numObj=0;
/**
* this array contains all of the pdf objects, ready for final assembly
*/
var $objects = array();
/**
* the objectId (number within the objects array) of the document catalog
*/
var $catalogId;
/**
* array carrying information about the fonts that the system currently knows about
* used to ensure that a font is not loaded twice, among other things
*/
var $fonts=array();
/**
* a record of the current font
*/
var $currentFont='';
/**
* the current base font
*/
var $currentBaseFont='';
/**
* the number of the current font within the font array
*/
var $currentFontNum=0;
/**
*
*/
var $currentNode;
/**
* object number of the current page
*/
var $currentPage;
/**
* object number of the currently active contents block
*/
var $currentContents;
/**
* number of fonts within the system
*/
var $numFonts=0;
/**
* current colour for fill operations, defaults to inactive value, all three components should be between 0 and 1 inclusive when active
*/
var $currentColour=array('r'=>-1,'g'=>-1,'b'=>-1);
/**
* current colour for stroke operations (lines etc.)
*/
var $currentStrokeColour=array('r'=>-1,'g'=>-1,'b'=>-1);
/**
* current style that lines are drawn in
*/
var $currentLineStyle='';
/**
* an array which is used to save the state of the document, mainly the colours and styles
* it is used to temporarily change to another state, the change back to what it was before
*/
var $stateStack = array();
/**
* number of elements within the state stack
*/
var $nStateStack = 0;
/**
* number of page objects within the document
*/
var $numPages=0;
/**
* object Id storage stack
*/
var $stack=array();
/**
* number of elements within the object Id storage stack
*/
var $nStack=0;
/**
* an array which contains information about the objects which are not firmly attached to pages
* these have been added with the addObject function
*/
var $looseObjects=array();
/**
* array contains infomation about how the loose objects are to be added to the document
*/
var $addLooseObjects=array();
/**
* the objectId of the information object for the document
* this contains authorship, title etc.
*/
var $infoObject=0;
/**
* number of images being tracked within the document
*/
var $numImages=0;
/**
* an array containing options about the document
* it defaults to turning on the compression of the objects
*/
var $options=array('compression'=>1);
/**
* the objectId of the first page of the document
*/
var $firstPageId;
/**
* used to track the last used value of the inter-word spacing, this is so that it is known
* when the spacing is changed.
*/
var $wordSpaceAdjust=0;
/**
* the object Id of the procset object
*/
var $procsetObjectId;
/**
* store the information about the relationship between font families
* this used so that the code knows which font is the bold version of another font, etc.
* the value of this array is initialised in the constuctor function.
*/
var $fontFamilies = array();
/**
* track if the current font is bolded or italicised
*/
var $currentTextState = '';
/**
* messages are stored here during processing, these can be selected afterwards to give some useful debug information
*/
var $messages='';
/**
* the ancryption array for the document encryption is stored here
*/
var $arc4='';
/**
* the object Id of the encryption information
*/
var $arc4_objnum=0;
/**
* the file identifier, used to uniquely identify a pdf document
*/
var $fileIdentifier='';
/**
* a flag to say if a document is to be encrypted or not
*/
var $encrypted=0;
/**
* the ancryption key for the encryption of all the document content (structure is not encrypted)
*/
var $encryptionKey='';
/**
* array which forms a stack to keep track of nested callback functions
*/
var $callback = array();
/**
* the number of callback functions in the callback array
*/
var $nCallback = 0;
/**
* store label->id pairs for named destinations, these will be used to replace internal links
* done this way so that destinations can be defined after the location that links to them
*/
var $destinations = array();
/**
* store the stack for the transaction commands, each item in here is a record of the values of all the
* variables within the class, so that the user can rollback at will (from each 'start' command)
* note that this includes the objects array, so these can be large.
*/
var $checkpoint = '';
/**
* class constructor
* this will start a new document
* @var array array of 4 numbers, defining the bottom left and upper right corner of the page. first two are normally zero.
*/
function Cpdf ($pageSize=array(0,0,612,792)){
  $this->newDocument($pageSize);

  // also initialize the font families that are known about already
  $this->setFontFamily('init');
//  $this->fileIdentifier = md5('xxxxxxxx'.time());

}

/**
* Document object methods (internal use only)
*
* There is about one object method for each type of object in the pdf document
* Each function has the same call list ($id,$action,$options).
* $id = the object ID of the object, or what it is to be if it is being created
* $action = a string specifying the action to be performed, though ALL must support:
*		   'new' - create the object with the id $id
*		   'out' - produce the output for the pdf object
* $options = optional, a string or array containing the various parameters for the object
*
* These, in conjunction with the output function are the ONLY way for output to be produced
* within the pdf 'file'.
*/

/**
*destination object, used to specify the location for the user to jump to, presently on opening
*/
function o_destination($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'destination','info'=>array());
	  $tmp = '';
	  switch ($options['type']){
		case 'XYZ':
		case 'FitR':
		  $tmp =  ' '.$options['p3'].$tmp;
		case 'FitH':
		case 'FitV':
		case 'FitBH':
		case 'FitBV':
		  $tmp =  ' '.$options['p1'].' '.$options['p2'].$tmp;
		case 'Fit':
		case 'FitB':
		  $tmp =  $options['type'].$tmp;
		  $this->objects[$id]['info']['string']=$tmp;
		  $this->objects[$id]['info']['page']=$options['page'];
	  }
	  break;
	case 'out':
	  $tmp = $o['info'];
	  $res="\n".$id." 0 obj\n".'['.$tmp['page'].' 0 R /'.$tmp['string']."]\nendobj\n";
	  return $res;
	  break;
  }
}

/**
* set the viewer preferences
*/
function o_viewerPreferences($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'viewerPreferences','info'=>array());
	  break;
	case 'add':
	  foreach($options as $k=>$v){
		switch ($k){
		  case 'HideToolbar':
		  case 'HideMenubar':
		  case 'HideWindowUI':
		  case 'FitWindow':
		  case 'CenterWindow':
		  case 'NonFullScreenPageMode':
		  case 'Direction':
			$o['info'][$k]=$v;
		  break;
		}
	  }
	  break;
	case 'out':

	  $res="\n".$id." 0 obj\n".'<< ';
	  foreach($o['info'] as $k=>$v){
		$res.="\n/".$k.' '.$v;
	  }
	  $res.="\n>>\n";
	  return $res;
	  break;
  }
}

/**
* define the document catalog, the overall controller for the document
*/
function o_catalog($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'catalog','info'=>array());
	  $this->catalogId=$id;
	  break;
	case 'outlines':
	case 'pages':
	case 'openHere':
	  $o['info'][$action]=$options;
	  break;
	case 'viewerPreferences':
	  if (!isset($o['info']['viewerPreferences'])){
		$this->numObj++;
		$this->o_viewerPreferences($this->numObj,'new');
		$o['info']['viewerPreferences']=$this->numObj;
	  }
	  $vp = $o['info']['viewerPreferences'];
	  $this->o_viewerPreferences($vp,'add',$options);
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n".'<< /Type /Catalog';
	  foreach($o['info'] as $k=>$v){
		switch($k){
		  case 'outlines':
			$res.="\n".'/Outlines '.$v.' 0 R';
			break;
		  case 'pages':
			$res.="\n".'/Pages '.$v.' 0 R';
			break;
		  case 'viewerPreferences':
			$res.="\n".'/ViewerPreferences '.$o['info']['viewerPreferences'].' 0 R';
			break;
		  case 'openHere':
			$res.="\n".'/OpenAction '.$o['info']['openHere'].' 0 R';
			break;
		}
	  }
	  $res.=" >>\nendobj";
	  return $res;
	  break;
  }
}

/**
* object which is a parent to the pages in the document
*/
function o_pages($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'pages','info'=>array());
	  $this->o_catalog($this->catalogId,'pages',$id);
	  break;
	case 'page':
	  if (!is_array($options)){
		// then it will just be the id of the new page
		$o['info']['pages'][]=$options;
	  } else {
		// then it should be an array having 'id','rid','pos', where rid=the page to which this one will be placed relative
		// and pos is either 'before' or 'after', saying where this page will fit.
		if (isset($options['id']) && isset($options['rid']) && isset($options['pos'])){
		  $i = array_search($options['rid'],$o['info']['pages']);
		  if (isset($o['info']['pages'][$i]) && $o['info']['pages'][$i]==$options['rid']){
			// then there is a match
			// make a space
			switch ($options['pos']){
			  case 'before':
				$k = $i;
				break;
			  case 'after':
				$k=$i+1;
				break;
			  default:
				$k=-1;
				break;
			}
			if ($k>=0){
			  for ($j=count($o['info']['pages'])-1;$j>=$k;$j--){
				$o['info']['pages'][$j+1]=$o['info']['pages'][$j];
			  }
			  $o['info']['pages'][$k]=$options['id'];
			}
		  }
		}
	  }
	  break;
	case 'procset':
	  $o['info']['procset']=$options;
	  break;
	case 'mediaBox':
	  $o['info']['mediaBox']=$options; // which should be an array of 4 numbers
	  break;
	case 'font':
	  $o['info']['fonts'][]=array('objNum'=>$options['objNum'],'fontNum'=>$options['fontNum']);
	  break;
	case 'xObject':
	  $o['info']['xObjects'][]=array('objNum'=>$options['objNum'],'label'=>$options['label']);
	  break;
	case 'out':
	  if (count($o['info']['pages'])){
		$res="\n".$id." 0 obj\n<< /Type /Pages\n/Kids [";
		foreach($o['info']['pages'] as $k=>$v){
		  $res.=$v." 0 R\n";
		}
		$res.="]\n/Count ".count($this->objects[$id]['info']['pages']);
		if ((isset($o['info']['fonts']) && count($o['info']['fonts'])) || isset($o['info']['procset'])){
		  $res.="\n/Resources <<";
		  if (isset($o['info']['procset'])){
			$res.="\n/ProcSet ".$o['info']['procset']." 0 R";
		  }
		  if (isset($o['info']['fonts']) && count($o['info']['fonts'])){
			$res.="\n/Font << ";
			foreach($o['info']['fonts'] as $finfo){
			  $res.="\n/F".$finfo['fontNum']." ".$finfo['objNum']." 0 R";
			}
			$res.=" >>";
		  }
		  if (isset($o['info']['xObjects']) && count($o['info']['xObjects'])){
			$res.="\n/XObject << ";
			foreach($o['info']['xObjects'] as $finfo){
			  $res.="\n/".$finfo['label']." ".$finfo['objNum']." 0 R";
			}
			$res.=" >>";
		  }
		  $res.="\n>>";
		  if (isset($o['info']['mediaBox'])){
			$tmp=$o['info']['mediaBox'];
			$res.="\n/MediaBox [".sprintf('%.3f',$tmp[0]).' '.sprintf('%.3f',$tmp[1]).' '.sprintf('%.3f',$tmp[2]).' '.sprintf('%.3f',$tmp[3]).']';
		  }
		}
		$res.="\n >>\nendobj";
	  } else {
		$res="\n".$id." 0 obj\n<< /Type /Pages\n/Count 0\n>>\nendobj";
	  }
	  return $res;
	break;
  }
}

/**
* define the outlines in the doc, empty for now
*/
function o_outlines($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'outlines','info'=>array('outlines'=>array()));
	  $this->o_catalog($this->catalogId,'outlines',$id);
	  break;
	case 'outline':
	  $o['info']['outlines'][]=$options;
	  break;
	case 'out':
	  if (count($o['info']['outlines'])){
		$res="\n".$id." 0 obj\n<< /Type /Outlines /Kids [";
		foreach($o['info']['outlines'] as $k=>$v){
		  $res.=$v." 0 R ";
		}
		$res.="] /Count ".count($o['info']['outlines'])." >>\nendobj";
	  } else {
		$res="\n".$id." 0 obj\n<< /Type /Outlines /Count 0 >>\nendobj";
	  }
	  return $res;
	  break;
  }
}

/**
* an object to hold the font description
*/
function o_font($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'font','info'=>array('name'=>$options['name'],'SubType'=>'Type1'));
	  $fontNum=$this->numFonts;
	  $this->objects[$id]['info']['fontNum']=$fontNum;
	  // deal with the encoding and the differences
	  if (isset($options['differences'])){
		// then we'll need an encoding dictionary
		$this->numObj++;
		$this->o_fontEncoding($this->numObj,'new',$options);
		$this->objects[$id]['info']['encodingDictionary']=$this->numObj;
	  } else if (isset($options['encoding'])){
		// we can specify encoding here
		switch($options['encoding']){
		  case 'WinAnsiEncoding':
		  case 'MacRomanEncoding':
		  case 'MacExpertEncoding':
			$this->objects[$id]['info']['encoding']=$options['encoding'];
			break;
		  case 'none':
			break;
		  default:
			$this->objects[$id]['info']['encoding']='WinAnsiEncoding';
			break;
		}
	  } else {
		$this->objects[$id]['info']['encoding']='WinAnsiEncoding';
	  }
	  // also tell the pages node about the new font
	  $this->o_pages($this->currentNode,'font',array('fontNum'=>$fontNum,'objNum'=>$id));
	  break;
	case 'add':
	  foreach ($options as $k=>$v){
		switch ($k){
		  case 'BaseFont':
			$o['info']['name'] = $v;
			break;
		  case 'FirstChar':
		  case 'LastChar':
		  case 'Widths':
		  case 'FontDescriptor':
		  case 'SubType':
		  $this->addMessage('o_font '.$k." : ".$v);
			$o['info'][$k] = $v;
			break;
		}
	 }
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n<< /Type /Font\n/Subtype /".$o['info']['SubType']."\n";
	  $res.="/Name /F".$o['info']['fontNum']."\n";
	  $res.="/BaseFont /".$o['info']['name']."\n";
	  if (isset($o['info']['encodingDictionary'])){
		// then place a reference to the dictionary
		$res.="/Encoding ".$o['info']['encodingDictionary']." 0 R\n";
	  } else if (isset($o['info']['encoding'])){
		// use the specified encoding
		$res.="/Encoding /".$o['info']['encoding']."\n";
	  }
	  if (isset($o['info']['FirstChar'])){
		$res.="/FirstChar ".$o['info']['FirstChar']."\n";
	  }
	  if (isset($o['info']['LastChar'])){
		$res.="/LastChar ".$o['info']['LastChar']."\n";
	  }
	  if (isset($o['info']['Widths'])){
		$res.="/Widths ".$o['info']['Widths']." 0 R\n";
	  }
	  if (isset($o['info']['FontDescriptor'])){
		$res.="/FontDescriptor ".$o['info']['FontDescriptor']." 0 R\n";
	  }
	  $res.=">>\nendobj";
	  return $res;
	  break;
  }
}

/**
* a font descriptor, needed for including additional fonts
*/
function o_fontDescriptor($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'fontDescriptor','info'=>$options);
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n<< /Type /FontDescriptor\n";
	  foreach ($o['info'] as $label => $value){
		switch ($label){
		  case 'Ascent':
		  case 'CapHeight':
		  case 'Descent':
		  case 'Flags':
		  case 'ItalicAngle':
		  case 'StemV':
		  case 'AvgWidth':
		  case 'Leading':
		  case 'MaxWidth':
		  case 'MissingWidth':
		  case 'StemH':
		  case 'XHeight':
		  case 'CharSet':
			if (strlen($value)){
			  $res.='/'.$label.' '.$value."\n";
			}
			break;
		  case 'FontFile':
		  case 'FontFile2':
		  case 'FontFile3':
			$res.='/'.$label.' '.$value." 0 R\n";
			break;
		  case 'FontBBox':
			$res.='/'.$label.' ['.$value[0].' '.$value[1].' '.$value[2].' '.$value[3]."]\n";
			break;
		  case 'FontName':
			$res.='/'.$label.' /'.$value."\n";
			break;
		}
	  }
	  $res.=">>\nendobj";
	  return $res;
	  break;
  }
}

/**
* the font encoding
*/
function o_fontEncoding($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  // the options array should contain 'differences' and maybe 'encoding'
	  $this->objects[$id]=array('t'=>'fontEncoding','info'=>$options);
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n<< /Type /Encoding\n";
	  if (!isset($o['info']['encoding'])){
		$o['info']['encoding']='WinAnsiEncoding';
	  }
	  if ($o['info']['encoding']!='none'){
		$res.="/BaseEncoding /".$o['info']['encoding']."\n";
	  }
	  $res.="/Differences \n[";
	  $onum=-100;
	  foreach($o['info']['differences'] as $num=>$label){
		if ($num!=$onum+1){
		  // we cannot make use of consecutive numbering
		  $res.= "\n".$num." /".$label;
		} else {
		  $res.= " /".$label;
		}
		$onum=$num;
	  }
	  $res.="\n]\n>>\nendobj";
	  return $res;
	  break;
  }
}

/**
* the document procset, solves some problems with printing to old PS printers
*/
function o_procset($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'procset','info'=>array('PDF'=>1,'Text'=>1));
	  $this->o_pages($this->currentNode,'procset',$id);
	  $this->procsetObjectId=$id;
	  break;
	case 'add':
	  // this is to add new items to the procset list, despite the fact that this is considered
	  // obselete, the items are required for printing to some postscript printers
	  switch ($options) {
		case 'ImageB':
		case 'ImageC':
		case 'ImageI':
		  $o['info'][$options]=1;
		  break;
	  }
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n[";
	  foreach ($o['info'] as $label=>$val){
		$res.='/'.$label.' ';
	  }
	  $res.="]\nendobj";
	  return $res;
	  break;
  }
}

/**
* define the document information
*/
function o_info($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->infoObject=$id;
	  $date='D:'.date('Ymd');
	  $this->objects[$id]=array('t'=>'info','info'=>array('Creator'=>'R and OS php pdf writer, http://www.ros.co.nz','CreationDate'=>$date));
	  break;
	case 'Title':
	case 'Author':
	case 'Subject':
	case 'Keywords':
	case 'Creator':
	case 'Producer':
	case 'CreationDate':
	case 'ModDate':
	case 'Trapped':
	  $o['info'][$action]=$options;
	  break;
	case 'out':
	  if ($this->encrypted){
		$this->encryptInit($id);
	  }
	  $res="\n".$id." 0 obj\n<<\n";
	  foreach ($o['info']  as $k=>$v){
		$res.='/'.$k.' (';
		if ($this->encrypted){
		  $res.=$this->filterText($this->ARC4($v));
		} else {
		  $res.=$this->filterText($v);
		}
		$res.=")\n";
	  }
	  $res.=">>\nendobj";
	  return $res;
	  break;
  }
}

/**
* an action object, used to link to URLS initially
*/
function o_action($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  if (is_array($options)){
		$this->objects[$id]=array('t'=>'action','info'=>$options,'type'=>$options['type']);
	  } else {
		// then assume a URI action
		$this->objects[$id]=array('t'=>'action','info'=>$options,'type'=>'URI');
	  }
	  break;
	case 'out':
	  if ($this->encrypted){
		$this->encryptInit($id);
	  }
	  $res="\n".$id." 0 obj\n<< /Type /Action";
	  switch($o['type']){
		case 'ilink':
		  // there will be an 'label' setting, this is the name of the destination
		  $res.="\n/S /GoTo\n/D ".$this->destinations[(string)$o['info']['label']]." 0 R";
		  break;
		case 'URI':
		  $res.="\n/S /URI\n/URI (";
		  if ($this->encrypted){
			$res.=$this->filterText($this->ARC4($o['info']));
		  } else {
			$res.=$this->filterText($o['info']);
		  }
		  $res.=")";
		  break;
	  }
	  $res.="\n>>\nendobj";
	  return $res;
	  break;
  }
}

/**
* an annotation object, this will add an annotation to the current page.
* initially will support just link annotations
*/
function o_annotation($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  // add the annotation to the current page
	  $pageId = $this->currentPage;
	  $this->o_page($pageId,'annot',$id);
	  // and add the action object which is going to be required
	  switch($options['type']){
		case 'link':
		  $this->objects[$id]=array('t'=>'annotation','info'=>$options);
		  $this->numObj++;
		  $this->o_action($this->numObj,'new',$options['url']);
		  $this->objects[$id]['info']['actionId']=$this->numObj;
		  break;
		case 'ilink':
		  // this is to a named internal link
		  $label = $options['label'];
		  $this->objects[$id]=array('t'=>'annotation','info'=>$options);
		  $this->numObj++;
		  $this->o_action($this->numObj,'new',array('type'=>'ilink','label'=>$label));
		  $this->objects[$id]['info']['actionId']=$this->numObj;
		  break;
	  }
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n<< /Type /Annot";
	  switch($o['info']['type']){
		case 'link':
		case 'ilink':
		  $res.= "\n/Subtype /Link";
		  break;
	  }
	  $res.="\n/A ".$o['info']['actionId']." 0 R";
	  $res.="\n/Border [0 0 0]";
	  $res.="\n/H /I";
	  $res.="\n/Rect [ ";
	  foreach($o['info']['rect'] as $v){
		$res.= sprintf("%.4f ",$v);
	  }
	  $res.="]";
	  $res.="\n>>\nendobj";
	  return $res;
	  break;
  }
}

/**
* a page object, it also creates a contents object to hold its contents
*/
function o_page($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->numPages++;
	  $this->objects[$id]=array('t'=>'page','info'=>array('parent'=>$this->currentNode,'pageNum'=>$this->numPages));
	  if (is_array($options)){
		// then this must be a page insertion, array shoudl contain 'rid','pos'=[before|after]
		$options['id']=$id;
		$this->o_pages($this->currentNode,'page',$options);
	  } else {
		$this->o_pages($this->currentNode,'page',$id);
	  }
	  $this->currentPage=$id;
	  //make a contents object to go with this page
	  $this->numObj++;
	  $this->o_contents($this->numObj,'new',$id);
	  $this->currentContents=$this->numObj;
	  $this->objects[$id]['info']['contents']=array();
	  $this->objects[$id]['info']['contents'][]=$this->numObj;
	  $match = ($this->numPages%2 ? 'odd' : 'even');
	  foreach($this->addLooseObjects as $oId=>$target){
		if ($target=='all' || $match==$target){
		  $this->objects[$id]['info']['contents'][]=$oId;
		}
	  }
	  break;
	case 'content':
	  $o['info']['contents'][]=$options;
	  break;
	case 'annot':
	  // add an annotation to this page
	  if (!isset($o['info']['annot'])){
		$o['info']['annot']=array();
	  }
	  // $options should contain the id of the annotation dictionary
	  $o['info']['annot'][]=$options;
	  break;
	case 'out':
	  $res="\n".$id." 0 obj\n<< /Type /Page";
	  $res.="\n/Parent ".$o['info']['parent']." 0 R";
	  if (isset($o['info']['annot'])){
		$res.="\n/Annots [";
		foreach($o['info']['annot'] as $aId){
		  $res.=" ".$aId." 0 R";
		}
		$res.=" ]";
	  }
	  $count = count($o['info']['contents']);
	  if ($count==1){
		$res.="\n/Contents ".$o['info']['contents'][0]." 0 R";
	  } else if ($count>1){
		$res.="\n/Contents [\n";
		foreach ($o['info']['contents'] as $cId){
		  $res.=$cId." 0 R\n";
		}
		$res.="]";
	  }
	  $res.="\n>>\nendobj";
	  return $res;
	  break;
  }
}

/**
* the contents objects hold all of the content which appears on pages
*/
function o_contents($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch ($action){
	case 'new':
	  $this->objects[$id]=array('t'=>'contents','c'=>'','info'=>array());
	  if (strlen($options) && intval($options)){
		// then this contents is the primary for a page
		$this->objects[$id]['onPage']=$options;
	  } else if ($options=='raw'){
		// then this page contains some other type of system object
		$this->objects[$id]['raw']=1;
	  }
	  break;
	case 'add':
	  // add more options to the decleration
	  foreach ($options as $k=>$v){
		$o['info'][$k]=$v;
	  }
	case 'out':
	  $tmp=$o['c'];
	  $res= "\n".$id." 0 obj\n";
	  if (isset($this->objects[$id]['raw'])){
		$res.=$tmp;
	  } else {
		$res.= "<<";
		if (function_exists('gzcompress') && $this->options['compression']){
		  // then implement ZLIB based compression on this content stream
		  $res.=" /Filter /FlateDecode";
		  $tmp = gzcompress($tmp);
		}
		if ($this->encrypted){
		  $this->encryptInit($id);
		  $tmp = $this->ARC4($tmp);
		}
		foreach($o['info'] as $k=>$v){
		  $res .= "\n/".$k.' '.$v;
		}
		$res.="\n/Length ".strlen($tmp)." >>\nstream\n".$tmp."\nendstream";
	  }
	  $res.="\nendobj\n";
	  return $res;
	  break;
  }
}

/**
* an image object, will be an XObject in the document, includes description and data
*/
function o_image($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch($action){
	case 'new':
	  // make the new object
	  $this->objects[$id]=array('t'=>'image','data'=>$options['data'],'info'=>array());
	  $this->objects[$id]['info']['Type']='/XObject';
	  $this->objects[$id]['info']['Subtype']='/Image';
	  $this->objects[$id]['info']['Width']=$options['iw'];
	  $this->objects[$id]['info']['Height']=$options['ih'];
	  if (!isset($options['type']) || $options['type']=='jpg'){
		if (!isset($options['channels'])){
		  $options['channels']=3;
		}
		switch($options['channels']){
		  case 1:
			$this->objects[$id]['info']['ColorSpace']='/DeviceGray';
			break;
		  default:
			$this->objects[$id]['info']['ColorSpace']='/DeviceRGB';
			break;
		}
		$this->objects[$id]['info']['Filter']='/DCTDecode';
		$this->objects[$id]['info']['BitsPerComponent']=8;
	  } else if ($options['type']=='png'){
		$this->objects[$id]['info']['Filter']='/FlateDecode';
		$this->objects[$id]['info']['DecodeParms']='<< /Predictor 15 /Colors '.$options['ncolor'].' /Columns '.$options['iw'].' /BitsPerComponent '.$options['bitsPerComponent'].'>>';
		if (strlen($options['pdata'])){
		  $tmp = ' [ /Indexed /DeviceRGB '.(strlen($options['pdata'])/3-1).' ';
		  $this->numObj++;
		  $this->o_contents($this->numObj,'new');
		  $this->objects[$this->numObj]['c']=$options['pdata'];
		  $tmp.=$this->numObj.' 0 R';
		  $tmp .=' ]';
		  $this->objects[$id]['info']['ColorSpace'] = $tmp;
		  if (isset($options['transparency'])){
			switch($options['transparency']['type']){
			  case 'indexed':
				$tmp=' [ '.$options['transparency']['data'].' '.$options['transparency']['data'].'] ';
				$this->objects[$id]['info']['Mask'] = $tmp;
				break;
			}
		  }
		} else {
		  $this->objects[$id]['info']['ColorSpace']='/'.$options['color'];
		}
		$this->objects[$id]['info']['BitsPerComponent']=$options['bitsPerComponent'];
	  }
	  // assign it a place in the named resource dictionary as an external object, according to
	  // the label passed in with it.
	  $this->o_pages($this->currentNode,'xObject',array('label'=>$options['label'],'objNum'=>$id));
	  // also make sure that we have the right procset object for it.
	  $this->o_procset($this->procsetObjectId,'add','ImageC');
	  break;
	case 'out':
	  $tmp=$o['data'];
	  $res= "\n".$id." 0 obj\n<<";
	  foreach($o['info'] as $k=>$v){
		$res.="\n/".$k.' '.$v;
	  }
	  if ($this->encrypted){
		$this->encryptInit($id);
		$tmp = $this->ARC4($tmp);
	  }
	  $res.="\n/Length ".strlen($tmp)." >>\nstream\n".$tmp."\nendstream\nendobj\n";
	  return $res;
	  break;
  }
}

/**
* encryption object.
*/
function o_encryption($id,$action,$options=''){
  if ($action!='new'){
	$o =& $this->objects[$id];
  }
  switch($action){
	case 'new':
	  // make the new object
	  $this->objects[$id]=array('t'=>'encryption','info'=>$options);
	  $this->arc4_objnum=$id;
	  // figure out the additional paramaters required
	  $pad = chr(0x28).chr(0xBF).chr(0x4E).chr(0x5E).chr(0x4E).chr(0x75).chr(0x8A).chr(0x41).chr(0x64).chr(0x00).chr(0x4E).chr(0x56).chr(0xFF).chr(0xFA).chr(0x01).chr(0x08).chr(0x2E).chr(0x2E).chr(0x00).chr(0xB6).chr(0xD0).chr(0x68).chr(0x3E).chr(0x80).chr(0x2F).chr(0x0C).chr(0xA9).chr(0xFE).chr(0x64).chr(0x53).chr(0x69).chr(0x7A);
	  $len = strlen($options['owner']);
	  if ($len>32){
		$owner = substr($options['owner'],0,32);
	  } else if ($len<32){
		$owner = $options['owner'].substr($pad,0,32-$len);
	  } else {
		$owner = $options['owner'];
	  }
	  $len = strlen($options['user']);
	  if ($len>32){
		$user = substr($options['user'],0,32);
	  } else if ($len<32){
		$user = $options['user'].substr($pad,0,32-$len);
	  } else {
		$user = $options['user'];
	  }
	  $tmp = $this->md5_16($owner);
	  $okey = substr($tmp,0,5);
	  $this->ARC4_init($okey);
	  $ovalue=$this->ARC4($user);
	  $this->objects[$id]['info']['O']=$ovalue;
	  // now make the u value, phew.
	  $tmp = $this->md5_16($user.$ovalue.chr($options['p']).chr(255).chr(255).chr(255).$this->fileIdentifier);
	  $ukey = substr($tmp,0,5);

	  $this->ARC4_init($ukey);
	  $this->encryptionKey = $ukey;
	  $this->encrypted=1;
	  $uvalue=$this->ARC4($pad);

	  $this->objects[$id]['info']['U']=$uvalue;
	  $this->encryptionKey=$ukey;

	  // initialize the arc4 array
	  break;
	case 'out':
	  $res= "\n".$id." 0 obj\n<<";
	  $res.="\n/Filter /Standard";
	  $res.="\n/V 1";
	  $res.="\n/R 2";
	  $res.="\n/O (".$this->filterText($o['info']['O']).')';
	  $res.="\n/U (".$this->filterText($o['info']['U']).')';
	  // and the p-value needs to be converted to account for the twos-complement approach
	  $o['info']['p'] = (($o['info']['p']^255)+1)*-1;
	  $res.="\n/P ".($o['info']['p']);
	  $res.="\n>>\nendobj\n";

	  return $res;
	  break;
  }
}

/**
* ARC4 functions
* A series of function to implement ARC4 encoding in PHP
*/

/**
* calculate the 16 byte version of the 128 bit md5 digest of the string
*/
function md5_16($string){
  $tmp = md5($string);
  $out='';
  for ($i=0;$i<=30;$i=$i+2){
	$out.=chr(hexdec(substr($tmp,$i,2)));
  }
  return $out;
}

/**
* initialize the encryption for processing a particular object
*/
function encryptInit($id){
  $tmp = $this->encryptionKey;
  $hex = dechex($id);
  if (strlen($hex)<6){
	$hex = substr('000000',0,6-strlen($hex)).$hex;
  }
  $tmp.= chr(hexdec(substr($hex,4,2))).chr(hexdec(substr($hex,2,2))).chr(hexdec(substr($hex,0,2))).chr(0).chr(0);
  $key = $this->md5_16($tmp);
  $this->ARC4_init(substr($key,0,10));
}

/**
* initialize the ARC4 encryption
*/
function ARC4_init($key=''){
  $this->arc4 = '';
  // setup the control array
  if (strlen($key)==0){
	return;
  }
  $k = '';
  while(strlen($k)<256){
	$k.=$key;
  }
  $k=substr($k,0,256);
  for ($i=0;$i<256;$i++){
	$this->arc4 .= chr($i);
  }
  $j=0;
  for ($i=0;$i<256;$i++){
	$t = $this->arc4[$i];
	$j = ($j + ord($t) + ord($k[$i]))%256;
	$this->arc4[$i]=$this->arc4[$j];
	$this->arc4[$j]=$t;
  }
}

/**
* ARC4 encrypt a text string
*/
function ARC4($text){
  $len=strlen($text);
  $a=0;
  $b=0;
  $c = $this->arc4;
  $out='';
  for ($i=0;$i<$len;$i++){
	$a = ($a+1)%256;
	$t= $c[$a];
	$b = ($b+ord($t))%256;
	$c[$a]=$c[$b];
	$c[$b]=$t;
	$k = ord($c[(ord($c[$a])+ord($c[$b]))%256]);
	$out.=chr(ord($text[$i]) ^ $k);
  }

  return $out;
}

/**
* functions which can be called to adjust or add to the document
*/

/**
* add a link in the document to an external URL
*/
function addLink($url,$x0,$y0,$x1,$y1){
  $this->numObj++;
  $info = array('type'=>'link','url'=>$url,'rect'=>array($x0,$y0,$x1,$y1));
  $this->o_annotation($this->numObj,'new',$info);
}

/**
* add a link in the document to an internal destination (ie. within the document)
*/
function addInternalLink($label,$x0,$y0,$x1,$y1){
  $this->numObj++;
  $info = array('type'=>'ilink','label'=>$label,'rect'=>array($x0,$y0,$x1,$y1));
  $this->o_annotation($this->numObj,'new',$info);
}

/**
* set the encryption of the document
* can be used to turn it on and/or set the passwords which it will have.
* also the functions that the user will have are set here, such as print, modify, add
*/
function setEncryption($userPass='',$ownerPass='',$pc=array()){
  $p=bindec(11000000);

  $options = array(
	 'print'=>4
	,'modify'=>8
	,'copy'=>16
	,'add'=>32
  );
  foreach($pc as $k=>$v){
	if ($v && isset($options[$k])){
	  $p+=$options[$k];
	} else if (isset($options[$v])){
	  $p+=$options[$v];
	}
  }
  // implement encryption on the document
  if ($this->arc4_objnum == 0){
	// then the block does not exist already, add it.
	$this->numObj++;
	if (strlen($ownerPass)==0){
	  $ownerPass=$userPass;
	}
	$this->o_encryption($this->numObj,'new',array('user'=>$userPass,'owner'=>$ownerPass,'p'=>$p));
  }
}

/**
* should be used for internal checks, not implemented as yet
*/
function checkAllHere(){
}

/**
* return the pdf stream as a string returned from the function
*/
function output($debug=0){

  if ($debug){
	// turn compression off
	$this->options['compression']=0;
  }

  if ($this->arc4_objnum){
	$this->ARC4_init($this->encryptionKey);
  }

  $this->checkAllHere();

  $xref=array();
  $content="%PDF-1.3\n%����\n";
//  $content="%PDF-1.3\n";
  $pos=strlen($content);
  foreach($this->objects as $k=>$v){
	$tmp='o_'.$v['t'];
	$cont=$this->$tmp($k,'out');
	$content.=$cont;
	$xref[]=$pos;
	$pos+=strlen($cont);
  }
  $content.="\nxref\n0 ".(count($xref)+1)."\n0000000000 65535 f \n";
  foreach($xref as $p){
	$content.=substr('0000000000',0,10-strlen($p)).$p." 00000 n \n";
  }
  $content.="\ntrailer\n  << /Size ".(count($xref)+1)."\n	 /Root 1 0 R\n	 /Info ".$this->infoObject." 0 R\n";
  // if encryption has been applied to this document then add the marker for this dictionary
  if ($this->arc4_objnum > 0){
	$content .= "/Encrypt ".$this->arc4_objnum." 0 R\n";
  }
  if (strlen($this->fileIdentifier)){
	$content .= "/ID[<".$this->fileIdentifier."><".$this->fileIdentifier.">]\n";
  }
  $content .= "  >>\nstartxref\n".$pos."\n%%EOF\n";
  return $content;
}

/**
* intialize a new document
* if this is called on an existing document results may be unpredictable, but the existing document would be lost at minimum
* this function is called automatically by the constructor function
*
* @access private
*/
function newDocument($pageSize=array(0,0,612,792)){
  $this->numObj=0;
  $this->objects = array();

  $this->numObj++;
  $this->o_catalog($this->numObj,'new');

  $this->numObj++;
  $this->o_outlines($this->numObj,'new');

  $this->numObj++;
  $this->o_pages($this->numObj,'new');

  $this->o_pages($this->numObj,'mediaBox',$pageSize);
  $this->currentNode = 3;

  $this->numObj++;
  $this->o_procset($this->numObj,'new');

  $this->numObj++;
  $this->o_info($this->numObj,'new');

  $this->numObj++;
  $this->o_page($this->numObj,'new');

  // need to store the first page id as there is no way to get it to the user during
  // startup
  $this->firstPageId = $this->currentContents;
}

/**
* open the font file and return a php structure containing it.
* first check if this one has been done before and saved in a form more suited to php
* note that if a php serialized version does not exist it will try and make one, but will
* require write access to the directory to do it... it is MUCH faster to have these serialized
* files.
*
* @access private
*/
function openFont($font){
  // assume that $font contains both the path and perhaps the extension to the file, split them
  $pos=strrpos($font,'/');
  if ($pos===false){
	$dir = './media/';
	$name = $font;
  } else {
	//$dir=substr($font,0,$pos+1);
	$dir="./media/";
	$name=substr($font,$pos+1);
  }

  if (substr($name,-4)=='.afm'){
	$name=substr($name,0,strlen($name)-4);
  }
  $this->addMessage('openFont: '.$font.' - '.$name);
  if (file_exists($dir.'php_'.$name.'.afm')){
	$this->addMessage('openFont: php file exists '.$dir.'php_'.$name.'.afm');
	$tmp = file($dir.'php_'.$name.'.afm');
	$this->fonts[$font]=unserialize($tmp[0]);
	if (!isset($this->fonts[$font]['_version_']) || $this->fonts[$font]['_version_']<1){
	  // if the font file is old, then clear it out and prepare for re-creation
	  $this->addMessage('openFont: clear out, make way for new version.');
	  unset($this->fonts[$font]);
	}
  }
  if (!isset($this->fonts[$font]) && file_exists($dir.$name.'.afm')){
	// then rebuild the php_<font>.afm file from the <font>.afm file
	$this->addMessage('openFont: build php file from '.$dir.$name.'.afm');
	$data = array();
	$file = file($dir.$name.'.afm');
	foreach ($file as $rowA){
	  $row=trim($rowA);
	  $pos=strpos($row,' ');
	  if ($pos){
		// then there must be some keyword
		$key = substr($row,0,$pos);
		switch ($key){
		  case 'FontName':
		  case 'FullName':
		  case 'FamilyName':
		  case 'Weight':
		  case 'ItalicAngle':
		  case 'IsFixedPitch':
		  case 'CharacterSet':
		  case 'UnderlinePosition':
		  case 'UnderlineThickness':
		  case 'Version':
		  case 'EncodingScheme':
		  case 'CapHeight':
		  case 'XHeight':
		  case 'Ascender':
		  case 'Descender':
		  case 'StdHW':
		  case 'StdVW':
		  case 'StartCharMetrics':
			$data[$key]=trim(substr($row,$pos));
			break;
		  case 'FontBBox':
			$data[$key]=explode(' ',trim(substr($row,$pos)));
			break;
		  case 'C':
			//C 39 ; WX 222 ; N quoteright ; B 53 463 157 718 ;
			$bits=explode(';',trim($row));
			$dtmp=array();
			foreach($bits as $bit){
			  $bits2 = explode(' ',trim($bit));
			  if (strlen($bits2[0])){
				if (count($bits2)>2){
				  $dtmp[$bits2[0]]=array();
				  for ($i=1;$i<count($bits2);$i++){
					$dtmp[$bits2[0]][]=$bits2[$i];
				  }
				} else if (count($bits2)==2){
				  $dtmp[$bits2[0]]=$bits2[1];
				}
			  }
			}
			if ($dtmp['C']>=0){
			  $data['C'][$dtmp['C']]=$dtmp;
			  $data['C'][$dtmp['N']]=$dtmp;
			} else {
			  $data['C'][$dtmp['N']]=$dtmp;
			}
			break;
		  case 'KPX':
			//KPX Adieresis yacute -40
			$bits=explode(' ',trim($row));
			$data['KPX'][$bits[1]][$bits[2]]=$bits[3];
			break;
		}
	  }
	}
	$data['_version_']=1;
	$this->fonts[$font]=$data;
	$fp = @fopen($dir.'php_'.$name.'.afm','w') or die ("Please make sure your \"media\" directory is writeable (CHMOD 777).");
	fwrite($fp,serialize($data));
	fclose($fp);
	mosChmod($dir.'php_'.$name.'.afm');
  } else if (!isset($this->fonts[$font])){
	$this->addMessage('openFont: no font file found');
//	echo 'Font not Found '.$font;
  }
}

/**
* if the font is not loaded then load it and make the required object
* else just make it the current font
* the encoding array can contain 'encoding'=> 'none','WinAnsiEncoding','MacRomanEncoding' or 'MacExpertEncoding'
* note that encoding='none' will need to be used for symbolic fonts
* and 'differences' => an array of mappings between numbers 0->255 and character names.
*
*/
function selectFont($fontName,$encoding='',$set=1){
  if (!isset($this->fonts[$fontName])){
	// load the file
	$this->openFont($fontName);
	if (isset($this->fonts[$fontName])){
	  $this->numObj++;
	  $this->numFonts++;
	  $pos=strrpos($fontName,'/');
//	  $dir=substr($fontName,0,$pos+1);
	  $name=substr($fontName,$pos+1);
	  if (substr($name,-4)=='.afm'){
		$name=substr($name,0,strlen($name)-4);
	  }
	  $options=array('name'=>$name);
	  if (is_array($encoding)){
		// then encoding and differences might be set
		if (isset($encoding['encoding'])){
		  $options['encoding']=$encoding['encoding'];
		}
		if (isset($encoding['differences'])){
		  $options['differences']=$encoding['differences'];
		}
	  } else if (strlen($encoding)){
		// then perhaps only the encoding has been set
		$options['encoding']=$encoding;
	  }
	  $fontObj = $this->numObj;
	  $this->o_font($this->numObj,'new',$options);
	  $this->fonts[$fontName]['fontNum']=$this->numFonts;
	  // if this is a '.afm' font, and there is a '.pfa' file to go with it ( as there
	  // should be for all non-basic fonts), then load it into an object and put the
	  // references into the font object
	  $basefile = substr($fontName,0,strlen($fontName)-4);
	  if (file_exists($basefile.'.pfb')){
		$fbtype = 'pfb';
	  } else if (file_exists($basefile.'.ttf')){
		$fbtype = 'ttf';
	  } else {
		$fbtype='';
	  }
	  $fbfile = $basefile.'.'.$fbtype;

//	  $pfbfile = substr($fontName,0,strlen($fontName)-4).'.pfb';
//	  $ttffile = substr($fontName,0,strlen($fontName)-4).'.ttf';
	  $this->addMessage('selectFont: checking for - '.$fbfile);
	  if (substr($fontName,-4)=='.afm' && strlen($fbtype) ){
		$adobeFontName = $this->fonts[$fontName]['FontName'];
//		$fontObj = $this->numObj;
		$this->addMessage('selectFont: adding font file - '.$fbfile.' - '.$adobeFontName);
		// find the array of fond widths, and put that into an object.
		$firstChar = -1;
		$lastChar = 0;
		$widths = array();
		foreach ($this->fonts[$fontName]['C'] as $num=>$d){
		  if (intval($num)>0 || $num=='0'){
			if ($lastChar>0 && $num>$lastChar+1){
			  for($i=$lastChar+1;$i<$num;$i++){
				$widths[] = 0;
			  }
			}
			$widths[] = $d['WX'];
			if ($firstChar==-1){
			  $firstChar = $num;
			}
			$lastChar = $num;
		  }
		}
		// also need to adjust the widths for the differences array
		if (isset($options['differences'])){
		  foreach($options['differences'] as $charNum=>$charName){
			if ($charNum>$lastChar){
			  for($i=$lastChar+1;$i<=$charNum;$i++){
				$widths[]=0;
			  }
			  $lastChar=$charNum;
			}
			if (isset($this->fonts[$fontName]['C'][$charName])){
			  $widths[$charNum-$firstChar]=$this->fonts[$fontName]['C'][$charName]['WX'];
			}
		  }
		}
		$this->addMessage('selectFont: FirstChar='.$firstChar);
		$this->addMessage('selectFont: LastChar='.$lastChar);
		$this->numObj++;
		$this->o_contents($this->numObj,'new','raw');
		$this->objects[$this->numObj]['c'].='[';
		foreach($widths as $width){
		  $this->objects[$this->numObj]['c'].=' '.$width;
		}
		$this->objects[$this->numObj]['c'].=' ]';
		$widthid = $this->numObj;

		// load the pfb file, and put that into an object too.
		// note that pdf supports only binary format type 1 font files, though there is a
		// simple utility to convert them from pfa to pfb.
		$fp = fopen($fbfile,'rb');
		$tmp = get_magic_quotes_runtime();
		set_magic_quotes_runtime(0);
		$data = fread($fp,filesize($fbfile));
		set_magic_quotes_runtime($tmp);
		fclose($fp);

		// create the font descriptor
		$this->numObj++;
		$fontDescriptorId = $this->numObj;
		$this->numObj++;
		$pfbid = $this->numObj;
		// determine flags (more than a little flakey, hopefully will not matter much)
		$flags=0;
		if ($this->fonts[$fontName]['ItalicAngle']!=0){ $flags+=pow(2,6); }
		if ($this->fonts[$fontName]['IsFixedPitch']=='true'){ $flags+=1; }
		$flags+=pow(2,5); // assume non-sybolic

		$list = array('Ascent'=>'Ascender','CapHeight'=>'CapHeight','Descent'=>'Descender','FontBBox'=>'FontBBox','ItalicAngle'=>'ItalicAngle');
		$fdopt = array(
		 'Flags'=>$flags
		 ,'FontName'=>$adobeFontName
		 ,'StemV'=>100  // don't know what the value for this should be!
		);
		foreach($list as $k=>$v){
		  if (isset($this->fonts[$fontName][$v])){
			$fdopt[$k]=$this->fonts[$fontName][$v];
		  }
		}

		if ($fbtype=='pfb'){
		  $fdopt['FontFile']=$pfbid;
		} else if ($fbtype=='ttf'){
		  $fdopt['FontFile2']=$pfbid;
		}
		$this->o_fontDescriptor($fontDescriptorId,'new',$fdopt);

		// embed the font program
		$this->o_contents($this->numObj,'new');
		$this->objects[$pfbid]['c'].=$data;
		// determine the cruicial lengths within this file
		if ($fbtype=='pfb'){
		  $l1 = strpos($data,'eexec')+6;
		  $l2 = strpos($data,'00000000')-$l1;
		  $l3 = strlen($data)-$l2-$l1;
		  $this->o_contents($this->numObj,'add',array('Length1'=>$l1,'Length2'=>$l2,'Length3'=>$l3));
		} else if ($fbtype=='ttf'){
		  $l1 = strlen($data);
		  $this->o_contents($this->numObj,'add',array('Length1'=>$l1));
		}


		// tell the font object about all this new stuff
		$tmp = array('BaseFont'=>$adobeFontName,'Widths'=>$widthid
									  ,'FirstChar'=>$firstChar,'LastChar'=>$lastChar
									  ,'FontDescriptor'=>$fontDescriptorId);
		if ($fbtype=='ttf'){
		  $tmp['SubType']='TrueType';
		}
		$this->addMessage('adding extra info to font.('.$fontObj.')');
		foreach($tmp as $fk=>$fv){
		  $this->addMessage($fk." : ".$fv);
		}
		$this->o_font($fontObj,'add',$tmp);

	  } else {
		$this->addMessage('selectFont: pfb or ttf file not found, ok if this is one of the 14 standard fonts');
	  }


	  // also set the differences here, note that this means that these will take effect only the
	  //first time that a font is selected, else they are ignored
	  if (isset($options['differences'])){
		$this->fonts[$fontName]['differences']=$options['differences'];
	  }
	}
  }
  if ($set && isset($this->fonts[$fontName])){
	// so if for some reason the font was not set in the last one then it will not be selected
	$this->currentBaseFont=$fontName;
	// the next line means that if a new font is selected, then the current text state will be
	// applied to it as well.
	$this->setCurrentFont();
  }
  return $this->currentFontNum;
}

/**
* sets up the current font, based on the font families, and the current text state
* note that this system is quite flexible, a <b><i> font can be completely different to a
* <i><b> font, and even <b><b> will have to be defined within the family to have meaning
* This function is to be called whenever the currentTextState is changed, it will update
* the currentFont setting to whatever the appropriatte family one is.
* If the user calls selectFont themselves then that will reset the currentBaseFont, and the currentFont
* This function will change the currentFont to whatever it should be, but will not change the
* currentBaseFont.
*
* @access private
*/
function setCurrentFont(){
  if (strlen($this->currentBaseFont)==0){
	// then assume an initial font
	$this->selectFont('./fonts/Helvetica.afm');
  }
  $cf = substr($this->currentBaseFont,strrpos($this->currentBaseFont,'/')+1);
  if (strlen($this->currentTextState)
	&& isset($this->fontFamilies[$cf])
	  && isset($this->fontFamilies[$cf][$this->currentTextState])){
	// then we are in some state or another
	// and this font has a family, and the current setting exists within it
	// select the font, then return it
	$nf = substr($this->currentBaseFont,0,strrpos($this->currentBaseFont,'/')+1).$this->fontFamilies[$cf][$this->currentTextState];
	$this->selectFont($nf,'',0);
	$this->currentFont = $nf;
	$this->currentFontNum = $this->fonts[$nf]['fontNum'];
  } else {
	// the this font must not have the right family member for the current state
	// simply assume the base font
	$this->currentFont = $this->currentBaseFont;
	$this->currentFontNum = $this->fonts[$this->currentFont]['fontNum'];
  }
}

/**
* function for the user to find out what the ID is of the first page that was created during
* startup - useful if they wish to add something to it later.
*/
function getFirstPageId(){
  return $this->firstPageId;
}

/**
* add content to the currently active object
*
* @access private
*/
function addContent($content){
  $this->objects[$this->currentContents]['c'].=$content;
}

/**
* sets the colour for fill operations
*/
function setColor($r,$g,$b,$force=0){
  if ($r>=0 && ($force || $r!=$this->currentColour['r'] || $g!=$this->currentColour['g'] || $b!=$this->currentColour['b'])){
	$this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$r).' '.sprintf('%.3f',$g).' '.sprintf('%.3f',$b).' rg';
	$this->currentColour=array('r'=>$r,'g'=>$g,'b'=>$b);
  }
}

/**
* sets the colour for stroke operations
*/
function setStrokeColor($r,$g,$b,$force=0){
  if ($r>=0 && ($force || $r!=$this->currentStrokeColour['r'] || $g!=$this->currentStrokeColour['g'] || $b!=$this->currentStrokeColour['b'])){
	$this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$r).' '.sprintf('%.3f',$g).' '.sprintf('%.3f',$b).' RG';
	$this->currentStrokeColour=array('r'=>$r,'g'=>$g,'b'=>$b);
  }
}

/**
* draw a line from one set of coordinates to another
*/
function line($x1,$y1,$x2,$y2){
  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$x1).' '.sprintf('%.3f',$y1).' m '.sprintf('%.3f',$x2).' '.sprintf('%.3f',$y2).' l S';
}

/**
* draw a bezier curve based on 4 control points
*/
function curve($x0,$y0,$x1,$y1,$x2,$y2,$x3,$y3){
  // in the current line style, draw a bezier curve from (x0,y0) to (x3,y3) using the other two points
  // as the control points for the curve.
  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$x0).' '.sprintf('%.3f',$y0).' m '.sprintf('%.3f',$x1).' '.sprintf('%.3f',$y1);
  $this->objects[$this->currentContents]['c'].= ' '.sprintf('%.3f',$x2).' '.sprintf('%.3f',$y2).' '.sprintf('%.3f',$x3).' '.sprintf('%.3f',$y3).' c S';
}

/**
* draw a part of an ellipse
*/
function partEllipse($x0,$y0,$astart,$afinish,$r1,$r2=0,$angle=0,$nSeg=8){
  $this->ellipse($x0,$y0,$r1,$r2,$angle,$nSeg,$astart,$afinish,0);
}

/**
* draw a filled ellipse
*/
function filledEllipse($x0,$y0,$r1,$r2=0,$angle=0,$nSeg=8,$astart=0,$afinish=360){
  return $this->ellipse($x0,$y0,$r1,$r2=0,$angle,$nSeg,$astart,$afinish,1,1);
}

/**
* draw an ellipse
* note that the part and filled ellipse are just special cases of this function
*
* draws an ellipse in the current line style
* centered at $x0,$y0, radii $r1,$r2
* if $r2 is not set, then a circle is drawn
* nSeg is not allowed to be less than 2, as this will simply draw a line (and will even draw a
* pretty crappy shape at 2, as we are approximating with bezier curves.
*/
function ellipse($x0,$y0,$r1,$r2=0,$angle=0,$nSeg=8,$astart=0,$afinish=360,$close=1,$fill=0){
  if ($r1==0){
	return;
  }
  if ($r2==0){
	$r2=$r1;
  }
  if ($nSeg<2){
	$nSeg=2;
  }

  $astart = deg2rad((float)$astart);
  $afinish = deg2rad((float)$afinish);
  $totalAngle =$afinish-$astart;

  $dt = $totalAngle/$nSeg;
  $dtm = $dt/3;

  if ($angle != 0){
	$a = -1*deg2rad((float)$angle);
	$tmp = "\n q ";
	$tmp .= sprintf('%.3f',cos($a)).' '.sprintf('%.3f',(-1.0*sin($a))).' '.sprintf('%.3f',sin($a)).' '.sprintf('%.3f',cos($a)).' ';
	$tmp .= sprintf('%.3f',$x0).' '.sprintf('%.3f',$y0).' cm';
	$this->objects[$this->currentContents]['c'].= $tmp;
	$x0=0;
	$y0=0;
  }

  $t1 = $astart;
  $a0 = $x0+$r1*cos($t1);
  $b0 = $y0+$r2*sin($t1);
  $c0 = -$r1*sin($t1);
  $d0 = $r2*cos($t1);

  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$a0).' '.sprintf('%.3f',$b0).' m ';
  for ($i=1;$i<=$nSeg;$i++){
	// draw this bit of the total curve
	$t1 = $i*$dt+$astart;
	$a1 = $x0+$r1*cos($t1);
	$b1 = $y0+$r2*sin($t1);
	$c1 = -$r1*sin($t1);
	$d1 = $r2*cos($t1);
	$this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',($a0+$c0*$dtm)).' '.sprintf('%.3f',($b0+$d0*$dtm));
	$this->objects[$this->currentContents]['c'].= ' '.sprintf('%.3f',($a1-$c1*$dtm)).' '.sprintf('%.3f',($b1-$d1*$dtm)).' '.sprintf('%.3f',$a1).' '.sprintf('%.3f',$b1).' c';
	$a0=$a1;
	$b0=$b1;
	$c0=$c1;
	$d0=$d1;
  }
  if ($fill){
	$this->objects[$this->currentContents]['c'].=' f';
  } else {
	if ($close){
	  $this->objects[$this->currentContents]['c'].=' s'; // small 's' signifies closing the path as well
	} else {
	  $this->objects[$this->currentContents]['c'].=' S';
	}
  }
  if ($angle !=0){
	$this->objects[$this->currentContents]['c'].=' Q';
  }
}

/**
* this sets the line drawing style.
* width, is the thickness of the line in user units
* cap is the type of cap to put on the line, values can be 'butt','round','square'
*	where the diffference between 'square' and 'butt' is that 'square' projects a flat end past the
*	end of the line.
* join can be 'miter', 'round', 'bevel'
* dash is an array which sets the dash pattern, is a series of length values, which are the lengths of the
*   on and off dashes.
*   (2) represents 2 on, 2 off, 2 on , 2 off ...
*   (2,1) is 2 on, 1 off, 2 on, 1 off.. etc
* phase is a modifier on the dash pattern which is used to shift the point at which the pattern starts.
*/
function setLineStyle($width=1,$cap='',$join='',$dash='',$phase=0){

  // this is quite inefficient in that it sets all the parameters whenever 1 is changed, but will fix another day
  $string = '';
  if ($width>0){
	$string.= $width.' w';
  }
  $ca = array('butt'=>0,'round'=>1,'square'=>2);
  if (isset($ca[$cap])){
	$string.= ' '.$ca[$cap].' J';
  }
  $ja = array('miter'=>0,'round'=>1,'bevel'=>2);
  if (isset($ja[$join])){
	$string.= ' '.$ja[$join].' j';
  }
  if (is_array($dash)){
	$string.= ' [';
	foreach ($dash as $len){
	  $string.=' '.$len;
	}
	$string.= ' ] '.$phase.' d';
  }
  $this->currentLineStyle = $string;
  $this->objects[$this->currentContents]['c'].="\n".$string;
}

/**
* draw a polygon, the syntax for this is similar to the GD polygon command
*/
function polygon($p,$np,$f=0){
  $this->objects[$this->currentContents]['c'].="\n";
  $this->objects[$this->currentContents]['c'].=sprintf('%.3f',$p[0]).' '.sprintf('%.3f',$p[1]).' m ';
  for ($i=2;$i<$np*2;$i=$i+2){
	$this->objects[$this->currentContents]['c'].= sprintf('%.3f',$p[$i]).' '.sprintf('%.3f',$p[$i+1]).' l ';
  }
  if ($f==1){
	$this->objects[$this->currentContents]['c'].=' f';
  } else {
	$this->objects[$this->currentContents]['c'].=' S';
  }
}

/**
* a filled rectangle, note that it is the width and height of the rectangle which are the secondary paramaters, not
* the coordinates of the upper-right corner
*/
function filledRectangle($x1,$y1,$width,$height){
  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$x1).' '.sprintf('%.3f',$y1).' '.sprintf('%.3f',$width).' '.sprintf('%.3f',$height).' re f';
}

/**
* draw a rectangle, note that it is the width and height of the rectangle which are the secondary paramaters, not
* the coordinates of the upper-right corner
*/
function rectangle($x1,$y1,$width,$height){
  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$x1).' '.sprintf('%.3f',$y1).' '.sprintf('%.3f',$width).' '.sprintf('%.3f',$height).' re S';
}

/**
* add a new page to the document
* this also makes the new page the current active object
*/
function newPage($insert=0,$id=0,$pos='after'){

  // if there is a state saved, then go up the stack closing them
  // then on the new page, re-open them with the right setings

  if ($this->nStateStack){
	for ($i=$this->nStateStack;$i>=1;$i--){
	  $this->restoreState($i);
	}
  }

  $this->numObj++;
  if ($insert){
	// the id from the ezPdf class is the od of the contents of the page, not the page object itself
	// query that object to find the parent
	$rid = $this->objects[$id]['onPage'];
	$opt= array('rid'=>$rid,'pos'=>$pos);
	$this->o_page($this->numObj,'new',$opt);
  } else {
	$this->o_page($this->numObj,'new');
  }
  // if there is a stack saved, then put that onto the page
  if ($this->nStateStack){
	for ($i=1;$i<=$this->nStateStack;$i++){
	  $this->saveState($i);
	}
  }
  // and if there has been a stroke or fill colour set, then transfer them
  if ($this->currentColour['r']>=0){
	$this->setColor($this->currentColour['r'],$this->currentColour['g'],$this->currentColour['b'],1);
  }
  if ($this->currentStrokeColour['r']>=0){
	$this->setStrokeColor($this->currentStrokeColour['r'],$this->currentStrokeColour['g'],$this->currentStrokeColour['b'],1);
  }

  // if there is a line style set, then put this in too
  if (strlen($this->currentLineStyle)){
	$this->objects[$this->currentContents]['c'].="\n".$this->currentLineStyle;
  }

  // the call to the o_page object set currentContents to the present page, so this can be returned as the page id
  return $this->currentContents;
}

/**
* output the pdf code, streaming it to the browser
* the relevant headers are set so that hopefully the browser will recognise it
*/
function stream($options=''){
  // setting the options allows the adjustment of the headers
  // values at the moment are:
  // 'Content-Disposition'=>'filename'  - sets the filename, though not too sure how well this will
  //		work as in my trial the browser seems to use the filename of the php file with .pdf on the end
  // 'Accept-Ranges'=>1 or 0 - if this is not set to 1, then this header is not included, off by default
  //	this header seems to have caused some problems despite tha fact that it is supposed to solve
  //	them, so I am leaving it off by default.
  // 'compress'=> 1 or 0 - apply content stream compression, this is on (1) by default
  if (!is_array($options)){
	$options=array();
  }
  if ( isset($options['compress']) && $options['compress']==0){
	$tmp = $this->output(1);
  } else {
	$tmp = $this->output();
  }
  header("Content-type: application/pdf");
  header("Content-Length: ".strlen(ltrim($tmp)));
  $fileName = (isset($options['Content-Disposition'])?$options['Content-Disposition']:'file.pdf');
  header("Content-Disposition: inline; filename=".$fileName);
  if (isset($options['Accept-Ranges']) && $options['Accept-Ranges']==1){
	header("Accept-Ranges: ".strlen(ltrim($tmp)));
  }
  echo ltrim($tmp);
}

/**
* return the height in units of the current font in the given size
*/
function getFontHeight($size){
  if (!$this->numFonts){
	$this->selectFont('./fonts/Helvetica');
  }
  // for the current font, and the given size, what is the height of the font in user units
  $h = $this->fonts[$this->currentFont]['FontBBox'][3]-$this->fonts[$this->currentFont]['FontBBox'][1];
  return $size*$h/1000;
}

/**
* return the font decender, this will normally return a negative number
* if you add this number to the baseline, you get the level of the bottom of the font
* it is in the pdf user units
*/
function getFontDecender($size){
  // note that this will most likely return a negative value
  if (!$this->numFonts){
	$this->selectFont('./fonts/Helvetica');
  }
  $h = $this->fonts[$this->currentFont]['FontBBox'][1];
  return $size*$h/1000;
}

/**
* filter the text, this is applied to all text just before being inserted into the pdf document
* it escapes the various things that need to be escaped, and so on
*
* @access private
*/
function filterText($text){
  $text = str_replace('\\','\\\\',$text);
  $text = str_replace('(','\(',$text);
  $text = str_replace(')','\)',$text);
  $text = str_replace('&lt;','<',$text);
  $text = str_replace('&gt;','>',$text);
  $text = str_replace('&#039;','\'',$text);
  $text = str_replace('&quot;','"',$text);
  $text = str_replace('&amp;','&',$text);

  return $text;
}

/**
* given a start position and information about how text is to be laid out, calculate where
* on the page the text will end
*
* @access private
*/
function PRVTgetTextPosition($x,$y,$angle,$size,$wa,$text){
  // given this information return an array containing x and y for the end position as elements 0 and 1
  $w = $this->getTextWidth($size,$text);
  // need to adjust for the number of spaces in this text
  $words = explode(' ',$text);
  $nspaces=count($words)-1;
  $w += $wa*$nspaces;
  $a = deg2rad((float)$angle);
  return array(cos($a)*$w+$x,-sin($a)*$w+$y);
}

/**
* wrapper function for PRVTcheckTextDirective1
*
* @access private
*/
function PRVTcheckTextDirective(&$text,$i,&$f){
  $x=0;
  $y=0;
  return $this->PRVTcheckTextDirective1($text,$i,$f,0,$x,$y);
}

/**
* checks if the text stream contains a control directive
* if so then makes some changes and returns the number of characters involved in the directive
* this has been re-worked to include everything neccesary to fins the current writing point, so that
* the location can be sent to the callback function if required
* if the directive does not require a font change, then $f should be set to 0
*
* @access private
*/
function PRVTcheckTextDirective1(&$text,$i,&$f,$final,&$x,&$y,$size=0,$angle=0,$wordSpaceAdjust=0){
  $directive = 0;
  $j=$i;
  if ($text[$j]=='<'){
	$j++;
	switch($text[$j]){
	  case '/':
		$j++;
		if (strlen($text) <= $j){
		  return $directive;
		}
		switch($text[$j]){
		  case 'b':
		  case 'i':
			$j++;
			if ($text[$j]=='>'){
			  $p = strrpos($this->currentTextState,$text[$j-1]);
			  if ($p !== false){
				// then there is one to remove
				$this->currentTextState = substr($this->currentTextState,0,$p).substr($this->currentTextState,$p+1);
			  }
			  $directive=$j-$i+1;
			}
			break;
		  case 'c':
			// this this might be a callback function
			$j++;
			$k = strpos($text,'>',$j);
			if ($k!==false && $text[$j]==':'){
			  // then this will be treated as a callback directive
			  $directive = $k-$i+1;
			  $f=0;
			  // split the remainder on colons to get the function name and the paramater
			  $tmp = substr($text,$j+1,$k-$j-1);
			  $b1 = strpos($tmp,':');
			  if ($b1!==false){
				$func = substr($tmp,0,$b1);
				$parm = substr($tmp,$b1+1);
			  } else {
				$func=$tmp;
				$parm='';
			  }
			  if (!isset($func) || !strlen(trim($func))){
				$directive=0;
			  } else {
				// only call the function if this is the final call
				if ($final){
				  // need to assess the text position, calculate the text width to this point
				  // can use getTextWidth to find the text width I think
				  $tmp = $this->PRVTgetTextPosition($x,$y,$angle,$size,$wordSpaceAdjust,substr($text,0,$i));
				  $info = array('x'=>$tmp[0],'y'=>$tmp[1],'angle'=>$angle,'status'=>'end','p'=>$parm,'nCallback'=>$this->nCallback);
				  $x=$tmp[0];
				  $y=$tmp[1];
				  $ret = $this->$func($info);
				  if (is_array($ret)){
					// then the return from the callback function could set the position, to start with, later will do font colour, and font
					foreach($ret as $rk=>$rv){
					  switch($rk){
						case 'x':
						case 'y':
						  $$rk=$rv;
						  break;
					  }
					}
				  }
				  // also remove from to the stack
				  // for simplicity, just take from the end, fix this another day
				  $this->nCallback--;
				  if ($this->nCallback<0){
					$this->nCallBack=0;
				  }
				}
			  }
			}
			break;
		}
		break;
	  case 'b':
	  case 'i':
		$j++;
		if ($text[$j]=='>'){
		  $this->currentTextState.=$text[$j-1];
		  $directive=$j-$i+1;
		}
		break;
	  case 'C':
		$noClose=1;
	  case 'c':
		// this this might be a callback function
		$j++;
		$k = strpos($text,'>',$j);
		if ($k!==false && $text[$j]==':'){
		  // then this will be treated as a callback directive
		  $directive = $k-$i+1;
		  $f=0;
		  // split the remainder on colons to get the function name and the paramater
//		  $bits = explode(':',substr($text,$j+1,$k-$j-1));
		  $tmp = substr($text,$j+1,$k-$j-1);
		  $b1 = strpos($tmp,':');
		  if ($b1!==false){
			$func = substr($tmp,0,$b1);
			$parm = substr($tmp,$b1+1);
		  } else {
			$func=$tmp;
			$parm='';
		  }
		  if (!isset($func) || !strlen(trim($func))){
			$directive=0;
		  } else {
			// only call the function if this is the final call, ie, the one actually doing printing, not measurement
			if ($final){
			  // need to assess the text position, calculate the text width to this point
			  // can use getTextWidth to find the text width I think
			  // also add the text height and decender
			  $tmp = $this->PRVTgetTextPosition($x,$y,$angle,$size,$wordSpaceAdjust,substr($text,0,$i));
			  $info = array('x'=>$tmp[0],'y'=>$tmp[1],'angle'=>$angle,'status'=>'start','p'=>$parm,'f'=>$func,'height'=>$this->getFontHeight($size),'decender'=>$this->getFontDecender($size));
			  $x=$tmp[0];
			  $y=$tmp[1];
			  if (!isset($noClose) || !$noClose){
				// only add to the stack if this is a small 'c', therefore is a start-stop pair
				$this->nCallback++;
				$info['nCallback']=$this->nCallback;
				$this->callback[$this->nCallback]=$info;
			  }
			  $ret = $this->$func($info);
			  if (is_array($ret)){
				// then the return from the callback function could set the position, to start with, later will do font colour, and font
				foreach($ret as $rk=>$rv){
				  switch($rk){
					case 'x':
					case 'y':
					  $$rk=$rv;
					  break;
				  }
				}
			  }
			}
		  }
		}
		break;
	}
  }
  return $directive;
}

/**
* add text to the document, at a specified location, size and angle on the page
*/
function addText($x,$y,$size,$text,$angle=0,$wordSpaceAdjust=0){
  if (!$this->numFonts){$this->selectFont('./fonts/Helvetica');}

  // if there are any open callbacks, then they should be called, to show the start of the line
  if ($this->nCallback>0){
	for ($i=$this->nCallback;$i>0;$i--){
	  // call each function
	  $info = array('x'=>$x,'y'=>$y,'angle'=>$angle,'status'=>'sol','p'=>$this->callback[$i]['p'],'nCallback'=>$this->callback[$i]['nCallback'],'height'=>$this->callback[$i]['height'],'decender'=>$this->callback[$i]['decender']);
	  $func = $this->callback[$i]['f'];
	  $this->$func($info);
	}
  }
  if ($angle==0){
	$this->objects[$this->currentContents]['c'].="\n".'BT '.sprintf('%.3f',$x).' '.sprintf('%.3f',$y).' Td';
  } else {
	$a = deg2rad((float)$angle);
	$tmp = "\n".'BT ';
	$tmp .= sprintf('%.3f',cos($a)).' '.sprintf('%.3f',(-1.0*sin($a))).' '.sprintf('%.3f',sin($a)).' '.sprintf('%.3f',cos($a)).' ';
	$tmp .= sprintf('%.3f',$x).' '.sprintf('%.3f',$y).' Tm';
	$this->objects[$this->currentContents]['c'] .= $tmp;
  }
  if ($wordSpaceAdjust!=0 || $wordSpaceAdjust != $this->wordSpaceAdjust){
	$this->wordSpaceAdjust=$wordSpaceAdjust;
	$this->objects[$this->currentContents]['c'].=' '.sprintf('%.3f',$wordSpaceAdjust).' Tw';
  }
  $len=strlen($text);
  $start=0;
  for ($i=0;$i<$len;$i++){
	$f=1;
	$directive = $this->PRVTcheckTextDirective($text,$i,$f);
	if ($directive){
	  // then we should write what we need to
	  if ($i>$start){
		$part = substr($text,$start,$i-$start);
		$this->objects[$this->currentContents]['c'].=' /F'.$this->currentFontNum.' '.sprintf('%.1f',$size).' Tf ';
		$this->objects[$this->currentContents]['c'].=' ('.$this->filterText($part).') Tj';
	  }
	  if ($f){
		// then there was nothing drastic done here, restore the contents
		$this->setCurrentFont();
	  } else {
		$this->objects[$this->currentContents]['c'] .= ' ET';
		$f=1;
		$xp=$x;
		$yp=$y;
		$directive = $this->PRVTcheckTextDirective1($text,$i,$f,1,$xp,$yp,$size,$angle,$wordSpaceAdjust);

		// restart the text object
		  if ($angle==0){
			$this->objects[$this->currentContents]['c'].="\n".'BT '.sprintf('%.3f',$xp).' '.sprintf('%.3f',$yp).' Td';
		  } else {
			$a = deg2rad((float)$angle);
			$tmp = "\n".'BT ';
			$tmp .= sprintf('%.3f',cos($a)).' '.sprintf('%.3f',(-1.0*sin($a))).' '.sprintf('%.3f',sin($a)).' '.sprintf('%.3f',cos($a)).' ';
			$tmp .= sprintf('%.3f',$xp).' '.sprintf('%.3f',$yp).' Tm';
			$this->objects[$this->currentContents]['c'] .= $tmp;
		  }
		  if ($wordSpaceAdjust!=0 || $wordSpaceAdjust != $this->wordSpaceAdjust){
			$this->wordSpaceAdjust=$wordSpaceAdjust;
			$this->objects[$this->currentContents]['c'].=' '.sprintf('%.3f',$wordSpaceAdjust).' Tw';
		  }
	  }
	  // and move the writing point to the next piece of text
	  $i=$i+$directive-1;
	  $start=$i+1;
	}

  }
  if ($start<$len){
	$part = substr($text,$start);
	$this->objects[$this->currentContents]['c'].=' /F'.$this->currentFontNum.' '.sprintf('%.1f',$size).' Tf ';
	$this->objects[$this->currentContents]['c'].=' ('.$this->filterText($part).') Tj';
  }
  $this->objects[$this->currentContents]['c'].=' ET';

  // if there are any open callbacks, then they should be called, to show the end of the line
  if ($this->nCallback>0){
	for ($i=$this->nCallback;$i>0;$i--){
	  // call each function
	  $tmp = $this->PRVTgetTextPosition($x,$y,$angle,$size,$wordSpaceAdjust,$text);
	  $info = array('x'=>$tmp[0],'y'=>$tmp[1],'angle'=>$angle,'status'=>'eol','p'=>$this->callback[$i]['p'],'nCallback'=>$this->callback[$i]['nCallback'],'height'=>$this->callback[$i]['height'],'decender'=>$this->callback[$i]['decender']);
	  $func = $this->callback[$i]['f'];
	  $this->$func($info);
	}
  }

}

/**
* calculate how wide a given text string will be on a page, at a given size.
* this can be called externally, but is alse used by the other class functions
*/
function getTextWidth($size,$text){
  // this function should not change any of the settings, though it will need to
  // track any directives which change during calculation, so copy them at the start
  // and put them back at the end.
  $store_currentTextState = $this->currentTextState;

  if (!$this->numFonts){
	$this->selectFont('./fonts/Helvetica');
  }

  // converts a number or a float to a string so it can get the width
  $text = "$text";

  // hmm, this is where it all starts to get tricky - use the font information to
  // calculate the width of each character, add them up and convert to user units
  $w=0;
  $len=strlen($text);
  $cf = $this->currentFont;
  for ($i=0;$i<$len;$i++){
	$f=1;
	$directive = $this->PRVTcheckTextDirective($text,$i,$f);
	if ($directive){
	  if ($f){
		$this->setCurrentFont();
		$cf = $this->currentFont;
	  }
	  $i=$i+$directive-1;
	} else {
	  $char=ord($text[$i]);
	  if (isset($this->fonts[$cf]['differences'][$char])){
		// then this character is being replaced by another
		$name = $this->fonts[$cf]['differences'][$char];
		if (isset($this->fonts[$cf]['C'][$name]['WX'])){
		  $w+=$this->fonts[$cf]['C'][$name]['WX'];
		}
	  } else if (isset($this->fonts[$cf]['C'][$char]['WX'])){
		$w+=$this->fonts[$cf]['C'][$char]['WX'];
	  }
	}
  }

  $this->currentTextState = $store_currentTextState;
  $this->setCurrentFont();

  return $w*$size/1000;
}

/**
* do a part of the calculation for sorting out the justification of the text
*
* @access private
*/
function PRVTadjustWrapText($text,$actual,$width,&$x,&$adjust,$justification){
  switch ($justification){
	case 'left':
	  return;
	  break;
	case 'right':
	  $x+=$width-$actual;
	  break;
	case 'center':
	case 'centre':
	  $x+=($width-$actual)/2;
	  break;
	case 'full':
	  // count the number of words
	  $words = explode(' ',$text);
	  $nspaces=count($words)-1;
	  if ($nspaces>0){
		$adjust = ($width-$actual)/$nspaces;
	  } else {
		$adjust=0;
	  }
	  break;
  }
}

/**
* add text to the page, but ensure that it fits within a certain width
* if it does not fit then put in as much as possible, splitting at word boundaries
* and return the remainder.
* justification and angle can also be specified for the text
*/
function addTextWrap($x,$y,$width,$size,$text,$justification='left',$angle=0,$test=0){
  // this will display the text, and if it goes beyond the width $width, will backtrack to the
  // previous space or hyphen, and return the remainder of the text.

  // $justification can be set to 'left','right','center','centre','full'

  // need to store the initial text state, as this will change during the width calculation
  // but will need to be re-set before printing, so that the chars work out right
  $store_currentTextState = $this->currentTextState;

  if (!$this->numFonts){$this->selectFont('./fonts/Helvetica');}
  if ($width<=0){
	// error, pretend it printed ok, otherwise risking a loop
	return '';
  }
  $w=0;
  $break=0;
  $breakWidth=0;
  $len=strlen($text);
  $cf = $this->currentFont;
  $tw = $width/$size*1000;
  for ($i=0;$i<$len;$i++){
	$f=1;
	$directive = $this->PRVTcheckTextDirective($text,$i,$f);
	if ($directive){
	  if ($f){
		$this->setCurrentFont();
		$cf = $this->currentFont;
	  }
	  $i=$i+$directive-1;
	} else {
	  $cOrd = ord($text[$i]);
	  if (isset($this->fonts[$cf]['differences'][$cOrd])){
		// then this character is being replaced by another
		$cOrd2 = $this->fonts[$cf]['differences'][$cOrd];
	  } else {
		$cOrd2 = $cOrd;
	  }

	  if (isset($this->fonts[$cf]['C'][$cOrd2]['WX'])){
		$w+=$this->fonts[$cf]['C'][$cOrd2]['WX'];
	  }
	  if ($w>$tw){
		// then we need to truncate this line
		if ($break>0){
		  // then we have somewhere that we can split :)
		  if ($text[$break]==' '){
			$tmp = substr($text,0,$break);
		  } else {
			$tmp = substr($text,0,$break+1);
		  }
		  $adjust=0;
		  $this->PRVTadjustWrapText($tmp,$breakWidth,$width,$x,$adjust,$justification);

		  // reset the text state
		  $this->currentTextState = $store_currentTextState;
		  $this->setCurrentFont();
		  if (!$test){
			$this->addText($x,$y,$size,$tmp,$angle,$adjust);
		  }
		  return substr($text,$break+1);
		} else {
		  // just split before the current character
		  $tmp = substr($text,0,$i);
		  $adjust=0;
		  $ctmp=ord($text[$i]);
		  if (isset($this->fonts[$cf]['differences'][$ctmp])){
			$ctmp=$this->fonts[$cf]['differences'][$ctmp];
		  }
		  $tmpw=($w-$this->fonts[$cf]['C'][$ctmp]['WX'])*$size/1000;
		  $this->PRVTadjustWrapText($tmp,$tmpw,$width,$x,$adjust,$justification);
		  // reset the text state
		  $this->currentTextState = $store_currentTextState;
		  $this->setCurrentFont();
		  if (!$test){
			$this->addText($x,$y,$size,$tmp,$angle,$adjust);
		  }
		  return substr($text,$i);
		}
	  }
	  if ($text[$i]=='-'){
		$break=$i;
		$breakWidth = $w*$size/1000;
	  }
	  if ($text[$i]==' '){
		$break=$i;
		$ctmp=ord($text[$i]);
		if (isset($this->fonts[$cf]['differences'][$ctmp])){
		  $ctmp=$this->fonts[$cf]['differences'][$ctmp];
		}
		$breakWidth = ($w-$this->fonts[$cf]['C'][$ctmp]['WX'])*$size/1000;
	  }
	}
  }
  // then there was no need to break this line
  if ($justification=='full'){
	$justification='left';
  }
  $adjust=0;
  $tmpw=$w*$size/1000;
  $this->PRVTadjustWrapText($text,$tmpw,$width,$x,$adjust,$justification);
  // reset the text state
  $this->currentTextState = $store_currentTextState;
  $this->setCurrentFont();
  if (!$test){
	$this->addText($x,$y,$size,$text,$angle,$adjust,$angle);
  }
  return '';
}

/**
* this will be called at a new page to return the state to what it was on the
* end of the previous page, before the stack was closed down
* This is to get around not being able to have open 'q' across pages
*
*/
function saveState($pageEnd=0){
  if ($pageEnd){
	// this will be called at a new page to return the state to what it was on the
	// end of the previous page, before the stack was closed down
	// This is to get around not being able to have open 'q' across pages
	$opt = $this->stateStack[$pageEnd]; // ok to use this as stack starts numbering at 1
	$this->setColor($opt['col']['r'],$opt['col']['g'],$opt['col']['b'],1);
	$this->setStrokeColor($opt['str']['r'],$opt['str']['g'],$opt['str']['b'],1);
	$this->objects[$this->currentContents]['c'].="\n".$opt['lin'];
//	$this->currentLineStyle = $opt['lin'];
  } else {
	$this->nStateStack++;
	$this->stateStack[$this->nStateStack]=array(
	  'col'=>$this->currentColour
	 ,'str'=>$this->currentStrokeColour
	 ,'lin'=>$this->currentLineStyle
	);
  }
  $this->objects[$this->currentContents]['c'].="\nq";
}

/**
* restore a previously saved state
*/
function restoreState($pageEnd=0){
  if (!$pageEnd){
	$n = $this->nStateStack;
	$this->currentColour = $this->stateStack[$n]['col'];
	$this->currentStrokeColour = $this->stateStack[$n]['str'];
	$this->objects[$this->currentContents]['c'].="\n".$this->stateStack[$n]['lin'];
	$this->currentLineStyle = $this->stateStack[$n]['lin'];
	unset($this->stateStack[$n]);
	$this->nStateStack--;
  }
  $this->objects[$this->currentContents]['c'].="\nQ";
}

/**
* make a loose object, the output will go into this object, until it is closed, then will revert to
* the current one.
* this object will not appear until it is included within a page.
* the function will return the object number
*/
function openObject(){
  $this->nStack++;
  $this->stack[$this->nStack]=array('c'=>$this->currentContents,'p'=>$this->currentPage);
  // add a new object of the content type, to hold the data flow
  $this->numObj++;
  $this->o_contents($this->numObj,'new');
  $this->currentContents=$this->numObj;
  $this->looseObjects[$this->numObj]=1;

  return $this->numObj;
}

/**
* open an existing object for editing
*/
function reopenObject($id){
   $this->nStack++;
   $this->stack[$this->nStack]=array('c'=>$this->currentContents,'p'=>$this->currentPage);
   $this->currentContents=$id;
   // also if this object is the primary contents for a page, then set the current page to its parent
   if (isset($this->objects[$id]['onPage'])){
	 $this->currentPage = $this->objects[$id]['onPage'];
   }
}

/**
* close an object
*/
function closeObject(){
  // close the object, as long as there was one open in the first place, which will be indicated by
  // an objectId on the stack.
  if ($this->nStack>0){
	$this->currentContents=$this->stack[$this->nStack]['c'];
	$this->currentPage=$this->stack[$this->nStack]['p'];
	$this->nStack--;
	// easier to probably not worry about removing the old entries, they will be overwritten
	// if there are new ones.
  }
}

/**
* stop an object from appearing on pages from this point on
*/
function stopObject($id){
  // if an object has been appearing on pages up to now, then stop it, this page will
  // be the last one that could contian it.
  if (isset($this->addLooseObjects[$id])){
	$this->addLooseObjects[$id]='';
  }
}

/**
* after an object has been created, it wil only show if it has been added, using this function.
*/
function addObject($id,$options='add'){
  // add the specified object to the page
  if (isset($this->looseObjects[$id]) && $this->currentContents!=$id){
	// then it is a valid object, and it is not being added to itself
	switch($options){
	  case 'all':
		// then this object is to be added to this page (done in the next block) and
		// all future new pages.
		$this->addLooseObjects[$id]='all';
	  case 'add':
		if (isset($this->objects[$this->currentContents]['onPage'])){
		  // then the destination contents is the primary for the page
		  // (though this object is actually added to that page)
		  $this->o_page($this->objects[$this->currentContents]['onPage'],'content',$id);
		}
		break;
	  case 'even':
		$this->addLooseObjects[$id]='even';
		$pageObjectId=$this->objects[$this->currentContents]['onPage'];
		if ($this->objects[$pageObjectId]['info']['pageNum']%2==0){
		  $this->addObject($id); // hacky huh :)
		}
		break;
	  case 'odd':
		$this->addLooseObjects[$id]='odd';
		$pageObjectId=$this->objects[$this->currentContents]['onPage'];
		if ($this->objects[$pageObjectId]['info']['pageNum']%2==1){
		  $this->addObject($id); // hacky huh :)
		}
		break;
	  case 'next':
		$this->addLooseObjects[$id]='all';
		break;
	  case 'nexteven':
		$this->addLooseObjects[$id]='even';
		break;
	  case 'nextodd':
		$this->addLooseObjects[$id]='odd';
		break;
	}
  }
}

/**
* add content to the documents info object
*/
function addInfo($label,$value=0){
  // this will only work if the label is one of the valid ones.
  // modify this so that arrays can be passed as well.
  // if $label is an array then assume that it is key=>value pairs
  // else assume that they are both scalar, anything else will probably error
  if (is_array($label)){
	foreach ($label as $l=>$v){
	  $this->o_info($this->infoObject,$l,$v);
	}
  } else {
	$this->o_info($this->infoObject,$label,$value);
  }
}

/**
* set the viewer preferences of the document, it is up to the browser to obey these.
*/
function setPreferences($label,$value=0){
  // this will only work if the label is one of the valid ones.
  if (is_array($label)){
	foreach ($label as $l=>$v){
	  $this->o_catalog($this->catalogId,'viewerPreferences',array($l=>$v));
	}
  } else {
	$this->o_catalog($this->catalogId,'viewerPreferences',array($label=>$value));
  }
}

/**
* extract an integer from a position in a byte stream
*
* @access private
*/
function PRVT_getBytes(&$data,$pos,$num){
  // return the integer represented by $num bytes from $pos within $data
  $ret=0;
  for ($i=0;$i<$num;$i++){
	$ret=$ret*256;
	$ret+=ord($data[$pos+$i]);
  }
  return $ret;
}

/**
* add a PNG image into the document, from a file
* this should work with remote files
*/
function addPngFromFile($file,$x,$y,$w=0,$h=0){
  // read in a png file, interpret it, then add to the system
  $error=0;
  $tmp = get_magic_quotes_runtime();
  set_magic_quotes_runtime(0);
  $fp = @fopen($file,'rb');
  if ($fp){
	$data='';
	while(!feof($fp)){
	  $data .= fread($fp,1024);
	}
	fclose($fp);
  } else {
	$error = 1;
	$errormsg = 'trouble opening file: '.$file;
  }
  set_magic_quotes_runtime($tmp);

  if (!$error){
	$header = chr(137).chr(80).chr(78).chr(71).chr(13).chr(10).chr(26).chr(10);
	if (substr($data,0,8)!=$header){
	  $error=1;
	  $errormsg = 'this file does not have a valid header';
	}
  }

  if (!$error){
	// set pointer
	$p = 8;
	$len = strlen($data);
	// cycle through the file, identifying chunks
	$haveHeader=0;
	$info=array();
	$idata='';
	$pdata='';
	while ($p<$len){
	  $chunkLen = $this->PRVT_getBytes($data,$p,4);
	  $chunkType = substr($data,$p+4,4);
//	  echo $chunkType.' - '.$chunkLen.'<br>';

	  switch($chunkType){
		case 'IHDR':
		  // this is where all the file information comes from
		  $info['width']=$this->PRVT_getBytes($data,$p+8,4);
		  $info['height']=$this->PRVT_getBytes($data,$p+12,4);
		  $info['bitDepth']=ord($data[$p+16]);
		  $info['colorType']=ord($data[$p+17]);
		  $info['compressionMethod']=ord($data[$p+18]);
		  $info['filterMethod']=ord($data[$p+19]);
		  $info['interlaceMethod']=ord($data[$p+20]);
//print_r($info);
		  $haveHeader=1;
		  if ($info['compressionMethod']!=0){
			$error=1;
			$errormsg = 'unsupported compression method';
		  }
		  if ($info['filterMethod']!=0){
			$error=1;
			$errormsg = 'unsupported filter method';
		  }
		  break;
		case 'PLTE':
		  $pdata.=substr($data,$p+8,$chunkLen);
		  break;
		case 'IDAT':
		  $idata.=substr($data,$p+8,$chunkLen);
		  break;
		case 'tRNS':
		  //this chunk can only occur once and it must occur after the PLTE chunk and before IDAT chunk
		  //print "tRNS found, color type = ".$info['colorType']."<BR>";
		  $transparency = array();
		  if ($info['colorType'] == 3) { // indexed color, rbg
		  /* corresponding to entries in the plte chunk
		  Alpha for palette index 0: 1 byte
		  Alpha for palette index 1: 1 byte
		  ...etc...
		  */
			// there will be one entry for each palette entry. up until the last non-opaque entry.
			// set up an array, stretching over all palette entries which will be o (opaque) or 1 (transparent)
			$transparency['type']='indexed';
			$numPalette = strlen($pdata)/3;
			$trans=0;
			for ($i=$chunkLen;$i>=0;$i--){
			  if (ord($data[$p+8+$i])==0){
				$trans=$i;
			  }
			}
			$transparency['data'] = $trans;

		  } elseif($info['colorType'] == 0) { // grayscale
		  /* corresponding to entries in the plte chunk
		  Gray: 2 bytes, range 0 .. (2^bitdepth)-1
		  */
//			$transparency['grayscale']=$this->PRVT_getBytes($data,$p+8,2); // g = grayscale
			$transparency['type']='indexed';
			$transparency['data'] = ord($data[$p+8+1]);

		  } elseif($info['colorType'] == 2) { // truecolor
		  /* corresponding to entries in the plte chunk
		  Red: 2 bytes, range 0 .. (2^bitdepth)-1
		  Green: 2 bytes, range 0 .. (2^bitdepth)-1
		  Blue: 2 bytes, range 0 .. (2^bitdepth)-1
		  */
			$transparency['r']=$this->PRVT_getBytes($data,$p+8,2); // r from truecolor
			$transparency['g']=$this->PRVT_getBytes($data,$p+10,2); // g from truecolor
			$transparency['b']=$this->PRVT_getBytes($data,$p+12,2); // b from truecolor

		  } else {
		  //unsupported transparency type
		  }
		  // KS End new code
		  break;
		default:
		  break;
	  }

	  $p += $chunkLen+12;
	}

	if(!$haveHeader){
	  $error = 1;
	  $errormsg = 'information header is missing';
	}
	if (isset($info['interlaceMethod']) && $info['interlaceMethod']){
	  $error = 1;
	  $errormsg = 'There appears to be no support for interlaced images in pdf.';
	}
  }

  if (!$error && $info['bitDepth'] > 8){
	$error = 1;
	$errormsg = 'only bit depth of 8 or less is supported';
  }

  if (!$error){
	if ($info['colorType']!=2 && $info['colorType']!=0 && $info['colorType']!=3){
	  $error = 1;
	  $errormsg = 'transparancey alpha channel not supported, transparency only supported for palette images.';
	} else {
	  switch ($info['colorType']){
		case 3:
		  $color = 'DeviceRGB';
		  $ncolor=1;
		  break;
		case 2:
		  $color = 'DeviceRGB';
		  $ncolor=3;
		  break;
		case 0:
		  $color = 'DeviceGray';
		  $ncolor=1;
		  break;
	  }
	}
  }
  if ($error){
	$this->addMessage('PNG error - ('.$file.') '.$errormsg);
	return;
  }
  if ($w==0){
	$w=$h/$info['height']*$info['width'];
  }
  if ($h==0){
	$h=$w*$info['height']/$info['width'];
  }
//print_r($info);
  // so this image is ok... add it in.
  $this->numImages++;
  $im=$this->numImages;
  $label='I'.$im;
  $this->numObj++;
//  $this->o_image($this->numObj,'new',array('label'=>$label,'data'=>$idata,'iw'=>$w,'ih'=>$h,'type'=>'png','ic'=>$info['width']));
  $options = array('label'=>$label,'data'=>$idata,'bitsPerComponent'=>$info['bitDepth'],'pdata'=>$pdata
									  ,'iw'=>$info['width'],'ih'=>$info['height'],'type'=>'png','color'=>$color,'ncolor'=>$ncolor);
  if (isset($transparency)){
	$options['transparency']=$transparency;
  }
  $this->o_image($this->numObj,'new',$options);

  $this->objects[$this->currentContents]['c'].="\nq";
  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$w)." 0 0 ".sprintf('%.3f',$h)." ".sprintf('%.3f',$x)." ".sprintf('%.3f',$y)." cm";
  $this->objects[$this->currentContents]['c'].="\n/".$label.' Do';
  $this->objects[$this->currentContents]['c'].="\nQ";
}

/**
* add a JPEG image into the document, from a file
*/
function addJpegFromFile($img,$x,$y,$w=0,$h=0){
  // attempt to add a jpeg image straight from a file, using no GD commands
  // note that this function is unable to operate on a remote file.

  if (!file_exists($img)){
	return;
  }

  $tmp=getimagesize($img);
  $imageWidth=$tmp[0];
  $imageHeight=$tmp[1];

  if (isset($tmp['channels'])){
	$channels = $tmp['channels'];
  } else {
	$channels = 3;
  }

  if ($w<=0 && $h<=0){
	$w=$imageWidth;
  }
  if ($w==0){
	$w=$h/$imageHeight*$imageWidth;
  }
  if ($h==0){
	$h=$w*$imageHeight/$imageWidth;
  }

  $fp=fopen($img,'rb');

  $tmp = get_magic_quotes_runtime();
  set_magic_quotes_runtime(0);
  $data = fread($fp,filesize($img));
  set_magic_quotes_runtime($tmp);

  fclose($fp);

  $this->addJpegImage_common($data,$x,$y,$w,$h,$imageWidth,$imageHeight,$channels);
}

/**
* add an image into the document, from a GD object
* this function is not all that reliable, and I would probably encourage people to use
* the file based functions
*/
function addImage(&$img,$x,$y,$w=0,$h=0,$quality=75){
  // add a new image into the current location, as an external object
  // add the image at $x,$y, and with width and height as defined by $w & $h

  // note that this will only work with full colour images and makes them jpg images for display
  // later versions could present lossless image formats if there is interest.

  // there seems to be some problem here in that images that have quality set above 75 do not appear
  // not too sure why this is, but in the meantime I have restricted this to 75.
  if ($quality>75){
	$quality=75;
  }

  // if the width or height are set to zero, then set the other one based on keeping the image
  // height/width ratio the same, if they are both zero, then give up :)
  $imageWidth=imagesx($img);
  $imageHeight=imagesy($img);

  if ($w<=0 && $h<=0){
	return;
  }
  if ($w==0){
	$w=$h/$imageHeight*$imageWidth;
  }
  if ($h==0){
	$h=$w*$imageHeight/$imageWidth;
  }

  // gotta get the data out of the img..

  // so I write to a temp file, and then read it back.. soo ugly, my apologies.
  $tmpDir='/tmp';
  $tmpName=tempnam($tmpDir,'img');
  imagejpeg($img,$tmpName,$quality);
  $fp=fopen($tmpName,'rb');

  $tmp = get_magic_quotes_runtime();
  set_magic_quotes_runtime(0);
  $fp = @fopen($tmpName,'rb');
  if ($fp){
	$data='';
	while(!feof($fp)){
	  $data .= fread($fp,1024);
	}
	fclose($fp);
  } else {
	$error = 1;
	$errormsg = 'trouble opening file';
  }
//  $data = fread($fp,filesize($tmpName));
  set_magic_quotes_runtime($tmp);
//  fclose($fp);
  unlink($tmpName);
  $this->addJpegImage_common($data,$x,$y,$w,$h,$imageWidth,$imageHeight);
}

/**
* common code used by the two JPEG adding functions
*
* @access private
*/
function addJpegImage_common(&$data,$x,$y,$w=0,$h=0,$imageWidth,$imageHeight,$channels=3){
  // note that this function is not to be called externally
  // it is just the common code between the GD and the file options
  $this->numImages++;
  $im=$this->numImages;
  $label='I'.$im;
  $this->numObj++;
  $this->o_image($this->numObj,'new',array('label'=>$label,'data'=>$data,'iw'=>$imageWidth,'ih'=>$imageHeight,'channels'=>$channels));

  $this->objects[$this->currentContents]['c'].="\nq";
  $this->objects[$this->currentContents]['c'].="\n".sprintf('%.3f',$w)." 0 0 ".sprintf('%.3f',$h)." ".sprintf('%.3f',$x)." ".sprintf('%.3f',$y)." cm";
  $this->objects[$this->currentContents]['c'].="\n/".$label.' Do';
  $this->objects[$this->currentContents]['c'].="\nQ";
}

/**
* specify where the document should open when it first starts
*/
function openHere($style,$a=0,$b=0,$c=0){
  // this function will open the document at a specified page, in a specified style
  // the values for style, and the required paramters are:
  // 'XYZ'  left, top, zoom
  // 'Fit'
  // 'FitH' top
  // 'FitV' left
  // 'FitR' left,bottom,right
  // 'FitB'
  // 'FitBH' top
  // 'FitBV' left
  $this->numObj++;
  $this->o_destination($this->numObj,'new',array('page'=>$this->currentPage,'type'=>$style,'p1'=>$a,'p2'=>$b,'p3'=>$c));
  $id = $this->catalogId;
  $this->o_catalog($id,'openHere',$this->numObj);
}

/**
* create a labelled destination within the document
*/
function addDestination($label,$style,$a=0,$b=0,$c=0){
  // associates the given label with the destination, it is done this way so that a destination can be specified after
  // it has been linked to
  // styles are the same as the 'openHere' function
  $this->numObj++;
  $this->o_destination($this->numObj,'new',array('page'=>$this->currentPage,'type'=>$style,'p1'=>$a,'p2'=>$b,'p3'=>$c));
  $id = $this->numObj;
  // store the label->idf relationship, note that this means that labels can be used only once
  $this->destinations["$label"]=$id;
}

/**
* define font families, this is used to initialize the font families for the default fonts
* and for the user to add new ones for their fonts. The default bahavious can be overridden should
* that be desired.
*/
function setFontFamily($family,$options=''){
  if (!is_array($options)){
	if ($family=='init'){
	  // set the known family groups
	  // these font families will be used to enable bold and italic markers to be included
	  // within text streams. html forms will be used... <b></b> <i></i>
	  $this->fontFamilies['Helvetica.afm']=array(
		 'b'=>'Helvetica-Bold.afm'
		,'i'=>'Helvetica-Oblique.afm'
		,'bi'=>'Helvetica-BoldOblique.afm'
		,'ib'=>'Helvetica-BoldOblique.afm'
	  );
	  $this->fontFamilies['Courier.afm']=array(
		 'b'=>'Courier-Bold.afm'
		,'i'=>'Courier-Oblique.afm'
		,'bi'=>'Courier-BoldOblique.afm'
		,'ib'=>'Courier-BoldOblique.afm'
	  );
	  $this->fontFamilies['Times-Roman.afm']=array(
		 'b'=>'Times-Bold.afm'
		,'i'=>'Times-Italic.afm'
		,'bi'=>'Times-BoldItalic.afm'
		,'ib'=>'Times-BoldItalic.afm'
	  );
	}
  } else {
	// the user is trying to set a font family
	// note that this can also be used to set the base ones to something else
	if (strlen($family)){
	  $this->fontFamilies[$family] = $options;
	}
  }
}

/**
* used to add messages for use in debugging
*/
function addMessage($message){
  $this->messages.=$message."\n";
}

/**
* a few functions which should allow the document to be treated transactionally.
*/
function transaction($action){
  switch ($action){
	case 'start':
	  // store all the data away into the checkpoint variable
	  $data = get_object_vars($this);
	  $this->checkpoint = $data;
	  unset($data);
	  break;
	case 'commit':
	  if (is_array($this->checkpoint) && isset($this->checkpoint['checkpoint'])){
		$tmp = $this->checkpoint['checkpoint'];
		$this->checkpoint = $tmp;
		unset($tmp);
	  } else {
		$this->checkpoint='';
	  }
	  break;
	case 'rewind':
	  // do not destroy the current checkpoint, but move us back to the state then, so that we can try again
	  if (is_array($this->checkpoint)){
		// can only abort if were inside a checkpoint
		$tmp = $this->checkpoint;
		foreach ($tmp as $k=>$v){
		  if ($k != 'checkpoint'){
			$this->$k=$v;
		  }
		}
		unset($tmp);
	  }
	  break;
	case 'abort':
	  if (is_array($this->checkpoint)){
		// can only abort if were inside a checkpoint
		$tmp = $this->checkpoint;
		foreach ($tmp as $k=>$v){
		  $this->$k=$v;
		}
		unset($tmp);
	  }
	  break;
  }

}

} // end of class

?>